Wonderful responses all around, everyone.
Thank you for your input.
I rewrote my original description to clarify areas which
I believe I did not communicate correctly as well as areas on which I am still unclear.
Here's some follow-up too.
Originally Posted by
noglider
If you decide you need more power than any of these dynamos or batteries provide, you can get more than one.
I do not believe this will be the case.
I would assume a single hub dynamo would cover typical needs, no?
Originally Posted by
Drew Eckhardt
When I got my dynamo setup earlier this year the Luxos U was $103 at starbike.
bike-discount.de also had good prices.
Current prices:
starbike (converted to $) is $135 + $34 shipping = $169
bike-discount.de is $103 (but states cannot sell to US and will not provide shipping costs)
Originally Posted by
Drew Eckhardt
I opted to separate lights and USB power supply
so I wouldn't automatically lose power to my GPS when I turned on my light.
Is this typical, that only one device can receive power at a time on, say, a full battery?
I assumed this was fine.
Originally Posted by
Drew Eckhardt
I'd try the E-Werk with external cache battery
...
I'd avoid a non-integrated cache battery.
Isn't an external cache non-integrated?
Can you elaborate this?
Originally Posted by
Drew Eckhardt
With the boost from 5V DC to what it takes to charge the battery
you can lose 20% of your limited power output.
What is 5V DC? The output of the dynamo?
What is performing the boost?
Where is the loss occurring?
Can you elaborate this?
Originally Posted by
rifraf
I have an E-werk and a cache battery.
Do you go:
generator --> e-werk --> battery --> usb device, or
generator --> battery --> e-werk --> usb device.
Originally Posted by
rifraf
I have an E-werk and a cache battery.
The unit has little output when the lights are on.
Does all of this little output go to the battery in your setup?
Does a battery reject an output too small?
Originally Posted by
rifraf
The E-werk can be set up for various voltages and amperages
but mine is set up to at normal USB output as electrickery is way over my head
and I simply like my fit and forget system.
From a generalized standpoint, I would think this is fine,
excepting that sometimes USB trickle charge is less than the power drawn by the device,
and if the device itself doesn't have spare charge to burn in its battery,
it will not remain on (only a problem in emergencies, I suppose).